As I was racing through the house today, the above equation ran through my head. X being the sound made by feet on a stairway and "a" being species and "b" being weight. The result is that there seems to be an inverse relationship between weight and the noise one's feet make on the stairs... So it is that one cat (me) sounds like a herd of elephants.
But then a friend pointed out that many cats are able to alternate at will between herd of elephants sound and ninja like stealth. Hmmmm. Another variable seems to be claw length and traction. Mmmmm.
Clearly there is something wrong with my calculation. Back to the drawing board. Maybe a few more trips up and down the stairs will clarify the matter. This is what is called the scientific method.